I guess the issue with the Vauxhall lads is simply as the regulators supplied do not all give the fuel pressure the chip was mapped at, using a adjustable fpr obviously allows you to guarantee its set correctly rather than relying on a crushed fpr to be accurate (yes that it how they supply them !)
I totally understand where your coming from though but I do mean on a stock engine, with stock injectors etc. using them for big injectors etc.. I agree can only work right at one end and not the other
I totally understand where your coming from though but I do mean on a stock engine, with stock injectors etc. using them for big injectors etc.. I agree can only work right at one end and not the other

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